Two-stage cure polyimide oligomers

Details Two-stage cure polyimide oligomers Two-stage cure polyimide oligomers

C - Chemistry, Metallurgy

08

G

C08G 73/10 (2006.01) C08L 79/08 (2006.01) C09J 179/08 (2006.01)

Patent

CA 2634249

A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and poiyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

La présente invention concerne un procédé pour utiliser l'anhydride citraconique et l'anhydride itaconique en tant que coiffes terminales de durcissement par addition dans des réactions pour former des oligomères de poly(acide amique) et des oligomères de polyimide. La présente invention concerne en outre des préimprégnés et des adhésifs à haute température préparés à partir des oligomères résultants, ainsi que des composites à faible volume mort préparés à partir des préimprégnés.

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